Liquid–liquid equilibria for the binary systems of sulfolane with branched cycloalkanes

Liquid–liquid equilibrium (LLE) data were measured for three binary systems containing sulfolane and branched cycloalkanes (methylcyclopentane, methylcyclohexane, and ethylcyclohexane) over the temperature range around 300–460 K using a circulation type equipment with an equilibrium view cell. The compositions of both branched cycloalkane-rich and sulfolane-rich phases were analyzed by on-line gas chromatography. The binary liquid–liquid equilibrium data were correlated with the NRTL model and UNIQUAC model using temperature-dependent parameters. The both models correlated with a good accuracy.